Introduction to environmental toxicology and its role in environmental decision making -- A framework for environmental toxicology -- An introduction to toxicity testing -- Survey and review of typical toxicity test methods -- Routes of exposure and modes of action -- Factors modifying the activity of toxicants -- Inorganic gaseous pollutants -- Fluoride as a contaminant of developing economies -- Heavy metals -- Biotransformation, detoxification, and biodegradation -- Measuring and predicting the responses of ecological systems to toxicants -- Ecological risk assessment -- Appendix A: References for toxicity testing and interpretation -- Appendix B: Framework for ecological risk assessment